I am currently working on the occurrence database (arthropod, mainly for bees) in DwC format publishing in GBIF and have encountered some problems. The question is how to properly handle the dating of records collected from the traps, i.e., Malaise trap, Pan trap, and Blue vane trap?
Asides from typical “time-point event” such as using a sweep net or hand collecting, the occurrence from these traps typically have “set up date” and “collected date”, for an example, set the trap on 29 Dec 2020, waiting for a week, and collect it on 4 Jan 2021, so the arthropods can be fell for the trap whenever in this “time-range”.
So, how can I give them the time which sampling event occurs in specific Darwin Core terms? I currently use 4 of these without any problem as most of the records is the time-point event
1: verbatimeEventDate — no problem for this, just fill out all the information in range here
Next, these three fields might be trickier, I wonder what should I do?
2: day — filling the first or last date? yes I can just fill out in range as 13/20 (13 to 20), but what should I do if the time is across the month or year as in an example?
3: month — practically no problem except the case above
4: year — practically no problem except the case above
Or should I just give more DwC terms like
This must resolve the time-range occurrence problem that occurs for (2) to (4), but what is the most proper way to handle those? Just leave them blank? Also what to do in the case of time-point capture like sweep net? Just give this two fields the same date?